@media screen and (max-width: 768px) {
  main {
    display:flex !important;
	  flex-direction: column;
  }
  
  #second {
    order: 1;
  }

  #second_2 {
    order: 2;
  }

  #fourth {
    order: 3;
  }

  #six_sp {
    order: 4;
  }

  #seven {
    order: 5;
  }

  #eight {
    order: 6;
  }

  #nine {
    order: 7;
  }
}